<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="信息描述">
        <el-tag type="info">Excel 上传模版说明</el-tag>
        <el-tag>
          <i class="el-icon-download"/>
          <a :href="OSS_PATH + '/static/01.xlsx'">点击下载模版</a>
        </el-tag>

      </el-form-item>

      <el-form-item label="选择Excel">
        <el-upload
          ref="upload"
          :auto-upload="false"
          :on-success="fileUploadSuccess"
          :on-error="fileUploadError"
          :disabled="importBtnDisabled"
          :limit="1"
          :action="BASE_API+'/eduservice/subject/addSubject'"
          name="file"
          accept="application/vnd.ms-excel,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet">
          <el-button slot="trigger" size="small" type="primary">{{ fileUploadText }}</el-button>
          <el-button
            :loading="loading"
            style="margin-left: 10px;"
            size="small"
            type="success"
            :disabled="importBtnDisabled"
            @click="submitUpload">上传至服务器</el-button>
        </el-upload>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
  export default{
    data(){
      return{
        BASE_API:process.env.BASE_API,
        OSS_PATH:process.env.OSS_PATH,
        importBtnDisabled:false,
        loading:false,
        fileUploadText:"选取文件"
      }
    },
    created() {

    },
    methods:{
      // 上传至服务器
      submitUpload(){
        this.fileUploadText = "正在上传"
        this.importBtnDisabled = true
        this.loading = true
        this.$refs.upload.submit()
      },
      // 上传成功
      fileUploadSuccess(){
        this.$message({
            type: "success",
            message:"添加课程分类成功"
        }),
        this.$router.push({
          path:'/subject/list'
        })
      },
      // 上传失败
      fileUploadError(){
        this.$message({
          type:error,
          message:"添加课程分类失败"
        })
      }
    }
  }
</script>

<style>
</style>
